Why am I not receiving all my notifications after disabling ultra power save mode no Note 4?

[AC Question]

I do receive email and whatsapp notifications, but all other app notifications I am not receiving such as news apps, twitter, facebook, instagram and so on. I have not recently installed any app to cause this. I have checked the notification settings for these apps and they are turned on. I have tried rebooting to no avail. I do not want to reset my device because I think the problem will still exist after I turn off UPS mode.